Toy box is a 100% acrylic yarn which is ideal for babies and children's wear.A 3.75/100 gram skein contains 240 yds. It is considered a light worsted to light worsted weight yarn. Knits to 5 sts. per inch on a US 7 and crochets to 3 sts. to an inch on a US G/7 hook. Machine wash on gentle cycle and tumble dry low.